{
  "format": "delx/intent-card/v1",
  "id": "volatility-sample-api",
  "intent": "Volatility Sample for an agent workflow",
  "title": "Volatility Sample API for agents",
  "description": "Estimate descriptive sample volatility from caller-supplied returns — call when estimating descriptive sample volatility from returns. Use on caller-supplied ticks/returns when agents need signal prep without a licensed live market feed (ottoai-class demand, first-party transform). Returns deterministic machine-readable JSON for $0.003 USDC via x402 on Base. Execution is first-party, local-only, stateless, and memory-only with no paid upstream, no input retention, and no claim of live chain tip, web search, or media generation. Results are advisory; the caller owns authorization and production controls.",
  "keywords": [
    "Volatility Sample API",
    "Volatility Sample for agents",
    "pay per result API",
    "x402 API",
    "no API key"
  ],
  "updated_at": "2026-08-06",
  "canonical_url": "https://commerce.delx.ai/intents/volatility-sample-api",
  "machine_url": "https://commerce.delx.ai/intents/volatility-sample-api.json",
  "recommendation": {
    "tool_name": "util_volatility_sample",
    "service_name": "Delx Volatility Sample",
    "method": "POST",
    "resource": "https://api.delx.ai/api/v1/x402/volatility-sample",
    "price_usdc": "0.003",
    "payment_protocols": [
      "x402",
      "mpp"
    ],
    "input_schema": {
      "type": "object",
      "properties": {
        "returns": {
          "description": "Caller-supplied period returns for sample volatility.",
          "type": "array"
        },
        "periods_per_year": {
          "description": "Annualization factor (e.g. 365 for daily).",
          "type": "number"
        }
      },
      "required": [
        "returns"
      ],
      "additionalProperties": true
    },
    "example_input": {
      "returns": [
        0.01,
        -0.02,
        0.015,
        0
      ],
      "periods_per_year": 365
    },
    "example_output": {
      "schema": "delx/util-volatility-sample/v1",
      "count": 4,
      "mean": 0.00125,
      "standard_deviation": 0.01340476,
      "annualized_vol": 0.25609752,
      "advisory": "Descriptive sample volatility only."
    },
    "agentcash": {
      "buy": "npx agentcash@latest fetch https://api.delx.ai/api/v1/x402/volatility-sample -m POST -H 'x-delx-source: intent-card-volatility-sample-api' --max-amount 0.003 -b '{\"returns\":[0.01,-0.02,0.015,0],\"periods_per_year\":365}'",
      "max_amount_usdc": "0.003"
    }
  },
  "attribution": {
    "header": "x-delx-source",
    "value": "intent-card-volatility-sample-api"
  },
  "evidence": {
    "paid_openapi": "https://api.delx.ai/openapi.x402.json",
    "governed_portfolio": "https://api.delx.ai/x402-portfolio.json",
    "live_contract": "https://api.delx.ai/api/v1/x402/volatility-sample"
  }
}